http://qej35k7iimexwtcp6puykukprj3aqedoq2wgds5fgt2gtxdn7aezzmid.onion/why.html
The blockchain or the global ledger tracking transactions is an open database open for anyone to run a chain analysis and see how the flow of money has happened across parties. Additionally economic entities such as exchanges that convert your currency to fiat often require heavy forms of identity verification, especially for last mile exchanges towards fiat currency.
3 similar results skipped